linux-kernel - [PATCH v3 0/3] leds: aw2013: Document interrupt and pull-up supply

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Date:   Tue, 15 Aug 2023 19:21:03 +0200
From:   Stephan Gerhold <stephan@...hold.net>
To:     Pavel Machek <pavel@....cz>, Lee Jones <lee@...nel.org>
Cc:     Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Conor Dooley <conor+dt@...nel.org>,
        Nikita Travkin <nikita@...n.ru>, linux-leds@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        "Lin, Meng-Bo" <linmengbo0689@...tonmail.com>,
        Stephan Gerhold <stephan@...hold.net>
Subject: [PATCH v3 0/3] leds: aw2013: Document interrupt and pull-up supply

AW2013 has an optional interrupt pin "INTN" which is used to report 
completion of started operations (e.g. power up or LED breath effects). 
The driver does not use it (yet) but it should be already described for 
completeness inside the DT schema.

Since the interrupt and I2C lines operate in open drain low active mode 
a pull-up supply is needed for correct operation. Unfortunately there 
is no ideal place to describe it in the DT: The pull-up needed for the 
I2C lines could be described on the I2C bus. However, the pull-up 
needed for the interrupt line belongs neither directly to the interrupt 
controller nor to AW2013. Since the AW2013 driver will be typically in 
control of the power management and interrupt masking it makes more 
sense to describe it inside the AW2013 device tree node.

Changes in v3:
  - Rewrite commit messages based on discussion on v2
  - Also document missing interrupt in DT schema (new patch)

Discussion on v2:
https://lore.kernel.org/linux-leds/20230321220825.GA1685482-robh@kernel.org/

Signed-off-by: Stephan Gerhold <stephan@...hold.net>
---
Lin, Meng-Bo (1):
      leds: aw2013: Enable pull-up supply for interrupt and I2C

Stephan Gerhold (2):
      dt-bindings: leds: aw2013: Document interrupt
      dt-bindings: leds: Document pull-up supply for interrupt and I2C

 .../devicetree/bindings/leds/leds-aw2013.yaml      | 13 ++++++++
 drivers/leds/leds-aw2013.c                         | 36 +++++++++++++---------
 2 files changed, 35 insertions(+), 14 deletions(-)
---
base-commit: 841165267827955bb3295b066cb6a906ba9265c0
change-id: 20230815-aw2013-vio-92a4566c5863

Best regards,
-- 
Stephan Gerhold <stephan@...hold.net>